Cups and Saucers (Cobaea) - In favourable localities in the southern and western counties C. scandens, a well-known greenhouse plant, thrives against an outside wall, and will cover a considerable space of trellis-work during summer.
They are seldom green, although occasionally that colour is met with, as in some species of Cobaea, Hoya viridiflora, Gonolobus viridiflorus and Pentatropis spiralis.